Serial number placement on the Manhattan Navy differed from that on the Manhattan Pocket revolvers. Turning the Navy upside down reveals the serial number stamped on and in front of the trigger guard, on the bottom of the frame, and on the bottom of the barrel assembly. The serial number is also stamped on the butt strap. The straps securing the one-piece walnut grips in place were coated with a thin layer of silver, as was the trigger and trigger guard.Series I Navy revolvers below serial number 1000 had fatter grips that Waldo Nutter in Manhattan Firearms described as the Miss America Model because of the fully rounded butt.Some, but not all, of the Series I pistols under serial number 800 had cylinder stops that were trapezoidal in shape, unlike all later Manhattan Navy pistols that would have the rectangular cylinder stops.